18
To the Peroxisome Peroxisomes are thought to be artifact organelles – Oxidation reactions Without producing energy – Break down lipids – No synthesis of proteins – PTS1 and PTS2 are signals to import proteins PTS1 has a c-terminal SKL tripeptide

19
To the Nucleus Transport proteins – Proteins and RNA are leaving the nucleus – Proteins are trying to get into the nucleus – Some proteins are really big Nuclear Pore Complex (nucleoporin) – Very big allows diffusion of up to 40,000 Da proteins – Larger proteins must be accepted by complex